1 School of Nursing and Health Professions, University of San Francisco, Orange, CA, United States; Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA, United States. Electronic address: [email protected].
2 Children's Hospital of Eastern Ontario (CHEO) Research Institute, Ottawa, ON, Canada; School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada.
3 Boston University School of Public Health, Boston, MA, United States.
4 HealthPartners Institute, Minneapolis, MN, United States.
5 Centre for Fertility and Health, The Norwegian Institute of Public Health, Oslo, Norway.
6 Brighton Collaboration, A Program of the Task Force for Global Health, Decatur, GA, United States.
7 Kaiser Permanente Vaccine Study Center, Kaiser Permanente Northern California, Oakland, CA, United States.